An element such as the one shown in red in the accompanying figure has white space around the edge known as ____________________.

Which of the following defines the amount of time a host retains a specific IP address before it is renewed or released?

A. DHCP lease B. DNS suffix C. Subnet mask D. DHCP reservation

____ key cryptography uses a single key to both encrypt and decrypt the document.

A. User B. Private C. Public D. Known